Device and method for adjusting water level through water resistance

The invention relates to a device and method for adjusting the water level through water resistance, and the device comprises an electrode cabin, a compression cabin and a control box cabin which are arranged up and down, the electrode cabin is internally provided with an electrode and an electrode cabin liquid level meter, and the electrode cabin is connected with an electrode cabin water supplementing pipe and an overflow pipe; a compression cabin liquid level meter, a pressure sensor used for measuring the pressure of compressed air on the top of the compression cabin, a compression cabin high-position alarm and a compression cabin low-position alarm are arranged in the compression cabin, a water injection/discharge pipe and a compression cabin air injection/discharge pipe are connected to the compression cabin, and a communicating pipe is arranged between the electrode cabin and the compression cabin. A needle valve for finely adjusting the water level in the electrode cabin is mounted on the air injectio